Bicycle frame



FIG. 1 is a top, rear, and right side perspective view of a bicycleframe showing my new design;

FIG. 2 is a front and left side perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a left side elevation view thereof, to which the right sideelevation view is a mirror image; and,

FIG. 5 is a top plan view thereof.

The broken lines in the drawings illustrate portions of an environmentalbicycle that form no part of the claimed design.

CLAIM The ornamental design for a bicycle frame, as shown and described.